Author Increased Mileage Smoother Shifts After Battery Swap  (Read 2029 times)

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  • Offline mzflorida   us

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    Offline mzflorida

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    Increased Mileage Smoother Shifts After Battery Swap
    on: Sep 22, 2019, 08.59 pm
    Sep 22, 2019, 08.59 pm
    My battery threw a shoe and I had to swap it out.  The old battery was an off-brand put in by the dealer.  The new battery is a Yuasa.  The bike sat without a battery installed for several days.  I took it out today for about a 90 mile ride.  The bike is a 2016 DCT.  The shifts were smoother.  The acceleration was more refined.  This route that I ran I always use S1mode.  My mileage is typically 44.5 and it went up to 49.5.  I was running with my top case attached but empty.  I can find no suggestion anywhere that the absence of a battery could cause these improvements.  Coincidence or is there something to removing the battery from time to time?  Curiosity is driving this question, obviously, as I'll take all of those gains! 

    Thanks.


  • Offline Showkey   us

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    Offline Showkey

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    Re: Increased Mileage Smoother Shifts After Battery Swap
    Reply #1 on: Sep 22, 2019, 09.48 pm
    Sep 22, 2019, 09.48 pm
    Coincidence or placebo effect................. :155:

    There maybe a few ECU learned values on shift points. Fuel trim would correct in the first few minutes of running after operating temp is reached.  But I doubt that fuel trim value is lost with battery swap.
    Last Edit: Sep 22, 2019, 10.06 pm by Showkey

  • Offline mzflorida   us

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    Offline mzflorida

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    Re: Increased Mileage Smoother Shifts After Battery Swap
    Reply #2 on: Sep 22, 2019, 10.20 pm
    Sep 22, 2019, 10.20 pm
    So here is the weirder thing.  My wife rides a CTX700.  Her battery died too.  Same deal, without a battery for a few days.  She is not as in tune to the machine as I am but she commented how much better her bike was running. It too is a DCT.  No increase in mileage for her.  Strange. Thanks, Showkey! 

  • Offline Showkey   us

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    Re: Increased Mileage Smoother Shifts After Battery Swap
    Reply #3 on: Sep 23, 2019, 12.44 am
    Sep 23, 2019, 12.44 am
    NC and CTX owners have reported dash communication errors, check engine light and few other weird issues caused by low battery voltage, weak battery  or faulty battery connections. (I have a NC700 manual trans.)

    I guess an interesting experiment would be.........install the old battery and see if you detect performance changes.

    I do believe the shift points of the DCT are changed slightly over time based on the rider.
    Last Edit: Sep 23, 2019, 12.50 am by Showkey

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    Re: Increased Mileage Smoother Shifts After Battery Swap
    Reply #4 on: Sep 23, 2019, 02.00 am
    Sep 23, 2019, 02.00 am
    One other thought on battery voltage and shift quality.........the shifting servo uses a fair amount of power.   If overalll battery power is low ( for any reason) .......that servo motor could be sluggish?
    Last Edit: Sep 23, 2019, 02.04 am by Showkey

  • Offline mzflorida   us

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    Offline mzflorida

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    Re: Increased Mileage Smoother Shifts After Battery Swap
    Reply #5 on: Sep 23, 2019, 04.29 am
    Sep 23, 2019, 04.29 am
    That is actually a very interesting observation on the servo motor. As an aside, I owned an NC700.  Few regrets in life but I really regret selling that bike.  Looking at the NC750 to add to the fleet.

  • Offline Mcgrath   ie

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    Offline Mcgrath

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    Re: Increased Mileage Smoother Shifts After Battery Swap
    Reply #6 on: Sep 23, 2019, 09.36 pm
    Sep 23, 2019, 09.36 pm
    Think I read on here that disconnecting the battery for a while resets the ECU, could that make a change?
    As regards the NC, I had an nc750x DCT when the CT was getting a service, great bike..

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    Offline mzflorida

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    Re: Increased Mileage Smoother Shifts After Battery Swap
    Reply #7 on: Sep 23, 2019, 10.12 pm
    Sep 23, 2019, 10.12 pm
    *Originally Posted by Mcgrath [+]
    Think I read on here that disconnecting the battery for a while resets the ECU, could that make a change?
    As regards the NC, I had an nc750x DCT when the CT was getting a service, great bike..

    I am not sure what exactly the ECU controls, but I think that makes sense also.  Agreed on the NC750.